Below is a link to my website.
do like interlocks
have used them in most calibres now
All that glitters may not be gold....
I recovered a 162g SST in 7mm from soft earth that looked similar. Great thought I .... doing just what I want in the same way that you are. I ended up knocking the bullet off the kitchen table onto a tiled floor. This separated the lead core from the jacket. What became immediately apparent was that the lead core had slipped forwards in the jacket past the interlock ring by some considerable distance. Less impressive performance than at first suspected!